Wide Angle Ion Energy-Mass Analyzer Aries-L

— ARIES-L is a wide-angle ionic energy-mass analyzer that provides measurements of ion parameters in the energy range from 10 eV to 5000 eV, and can record the flux of neutral atoms from the lunar regolith. A distinctive feature of the instrument is the ability to simultaneously detect ions of the selected energy in a field of view close to 2π. Within the framework of the Luna-25 mission, the tasks of ion energy-mass analyzer ARIES-L is the study of the interaction of the solar wind with the regolith, the study of the regolith using secondary ion mass spectrometry and the determination of the flux of neutral atoms from the regolith caused by the action of charged particles. The field of view of the instrument close to 2π permits recording both the fluxes of solar wind ions and secondary particles from the regolith, which makes it possible to study the processes of interaction of primary fluxes of charged particles with regolith depending on the angle of incidence, which changes during the lunar day. The instrument will also allow measurements in magnetospheric plasma.